Mowing of a grass lawn facilitate better maintenance primarily owing to

Options

A. wounding stimulates regeneration
B. of removal of apical dominance and stimulation of intercalary meristem
C. of removal of apical dominance and promotion of cambial activity
D. of removal of apical dominance

Answer

### Step-by-Step Solution:

1. **Understanding Mowing**: Mowing a grass lawn involves cutting the grass to a certain height. This process is essential for maintaining the health and appearance of the lawn.

2. **Concept of Apical Dominance**: In plants, apical dominance refers to the phenomenon where the main central stem (apical bud) grows more strongly than the other side shoots (lateral or axillary buds). This is primarily due to the production of plant hormones, particularly auxins, which are concentrated in the apical bud.

3. **Effect of Mowing on Apical Dominance**: When the grass is mowed, the apical buds are removed or cut back. This removal reduces the dominance of the apical bud, allowing the lateral buds to grow more freely.

4. **Role of Intercalary Meristem**: Grass has intercalary meristems located at the base of the leaves and internodes. When the apical dominance is removed through mowing, these intercalary meristems can stimulate growth, leading to the development of new shoots and a denser lawn.

5. **Conclusion**: Therefore, mowing facilitates better maintenance of a grass lawn primarily due to the removal of apical dominance and the stimulation of intercalary meristem activity, which promotes the growth of lateral shoots.

### Final Answer:
Mowing of a grass lawn facilitates better maintenance primarily owing to the removal of apical dominance and stimulation of intercalary meristem activity.